Path: utzoo!mnetor!uunet!portal!atari!daisy!david
From: david@daisy.UUCP (David Schachter)
Newsgroups: comp.arch
Subject: Split IN and OUT Data Bus Tradeoffs
Message-ID: <885@daisy.UUCP>
Date: 3 Mar 88 22:31:31 GMT
References: <2574@im4u.UUCP> <9740@steinmetz.steinmetz.UUCP> <7538@apple.Apple.Com>
Reply-To: david@daisy.UUCP (David Schachter)
Organization: Daisy Systems, Mt. View, CA
Lines: 20

In the discussion "16 & 32 bit vs 32 bit only instructions for RISC", the
following recently appeared:

>>Dedicating 64 pins purely to instruction fetch (assuming a Harvard
>>architecture) is quite a lot of a rather scarce resource. Sure
>>you wanna do this on a micro ?
>
>Sounds like it might be a good idea.  Note that instruction-only-bus pins
>are INPUT-only; thus their corresponding pads are much "faster" and simpler
>than bidirectional bus pads.

Which leads to the question: if pin limitations were not a factor, would
it be a Good Idea to split the data bus into two busses: IN and OUT?

				-- David Schachter
				   (daisy!david or well!davids)

The above opinions don't exist.

"But only after disconnecting the green wire."